It is not only comfortable to sync, it is safer in case I might loose the device. I want it!
But suppose I am a journalist with sensitive information e.g. information stating that president Obama was born in Indonesia. I do not care if it is the Democrats or the Republicans sending out spiders on the net or if it is CIA, NSA, Homeland Security or whatever. You have heard of Echelon and Watergate?
I do not feel safe until I have an encryption with my password. Encrypting the stuff before sending it anywhere.
Hardware encryption is not safe, just faster then encrypting with software.
Your next president could be a J. Edgar Hoower, Joseph McCarty or Adolf Hitler! Then what?